论文标题
测量实验室的局部暗物质密度
Measuring the local Dark Matter density in the laboratory
论文作者
论文摘要
尽管有充分的证据表明我们宇宙中存在大量暗物质（DM），但仍未直接迹象表明它在我们自己的太阳系中存在。局部DM密度的所有估计均取决于更大尺度上的推断结果。我们首次证明了通过直接检测实验同时测量局部DM密度和相互作用横截面的可能性。它依赖于这样的假设，即在检测前经常在陆生核上散射出来的DM颗粒，从而诱导信号的额外时间依赖性。我们表明，对于sub-GEV DM，具有较大的自旋依赖性DM-Proton横截面，未来直接检测实验应能够以小于50％的不确定性重建局部DM密度。
Despite strong evidence for the existence of large amounts of dark matter (DM) in our Universe, there is no direct indication of its presence in our own solar system. All estimates of the local DM density rely on extrapolating results on much larger scales. We demonstrate for the first time the possibility of simultaneously measuring the local DM density and interaction cross-section with a direct detection experiment. It relies on the assumption that incoming DM particles frequently scatter on terrestrial nuclei prior to detection, inducing an additional time-dependence of the signal. We show that for sub-GeV DM, with a large spin-independent DM-proton cross section, future direct detection experiments should be able to reconstruct the local DM density with smaller than 50% uncertainty.
